Module 2: Disease Management
Module 1: Biology, symptoms, and Diagnosis
Welcome Module 3: Phytophthora ramorum Conclusion Take the Exam Further Information

Disease Cycle



Practice Questions








Risks to forests

Because Phytophthora ramorum infects some species of oak, it is considered to be of greatest danger to eastern forests (see below), where oak is one of the dominant species.

Preliminary SOD Risk/Hazard Map.

Figure from the USDA-Forest Service.

In Oregon, the wildland infestation now is limited to a small area in the extreme southwest corner of the state. As infected tanoak trees are found, they are cut, piled, and burned in an attempt to eradicate the disease

Eradication efforts in Curry County, OR.

Eradication efforts in Curry County, OR.

Photo by Oregon Department of Forestry and Oregon Department of Agriculture.


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